Recall that in 1990, Matthew Nordbrock was killed by lightning in the hut while sitting in the middle of the floor. He may or may not have been in contact with the stove pipe, but he definitely took the direct hit. Note also that several others were seriously injured. This prompted the installation of the heavy duty lightning rods and the present warning signs.
All of which means among other things that the lightning rods do NOT make this place safe in an electrical storm. Safer, maybe, but not safe. Note that the one killed was nearest the stovepipe, where the strike went to ground. Others were injured as well, however, meaning you don't have to take a direct hit to be injured. The way the rods and ground cables are arranged, anyone in the hut at the moment of a strike could at best be surrounded by lightning. Shake and bake time.
Hence, posted on the door:
